Menu
I have spent half Sunday on this now I need help:
I want to send a String including special chars UTF-8 encoded to a server using Java HttpURLConnection. The correct encoding of the chars fails.
Example:
strToSend: ä ù € strUrlEncoded: %C3%A4+%C3%B9+%E2%82%AC strReceived:ä ù â¬
My code:
urlConnection = (HttpURLConnection) new URL("http://localhost:8080/NetworkingServer/ServerServlet").openConnection();
urlConnection.setUseCaches(false);
urlConnection.setDoOutput(true); // Triggers POST.
urlConnection.setRequestProperty("accept-charset", "UTF-8");
urlConnection.setRequestProperty("content-type", "application/x-www-form-urlencoded");
String strToSend = "ä ù €";
System.out.println("strToSend: " + strToSend);
String strUrlEncoded = URLEncoder.encode(strToSend, "UTF-8");
System.out.println("strUrlEncoded: " + strUrlEncoded);
OutputStreamWriter writer = new OutputStreamWriter(urlConnection.getOutputStream(), "UTF-8");
writer.write(String.format("content=%s", strUrlEncoded));
writer.close();
Any ideas?
543
asked Apr 07 '13 17:04
URLConnection is the base class. HttpURLConnection is a derived class which you can use when you need the extra API and you are dealing with HTTP or HTTPS only. HttpsURLConnection is a 'more derived' class which you can use when you need the 'more extra' API and you are dealing with HTTPS only.
public abstract class HttpURLConnection extends URLConnection. A URLConnection with support for HTTP-specific features. See the spec for details. Each HttpURLConnection instance is used to make a single request but the underlying network connection to the HTTP server may be transparently shared by other instances.
In order to convert a String into UTF-8, we use the getBytes() method in Java. The getBytes() method encodes a String into a sequence of bytes and returns a byte array. where charsetName is the specific charset by which the String is encoded into an array of bytes.
UTF-8 has the ability to be as condensed as ASCII but can also contain any Unicode characters with some increase in the size of the file. UTF stands for Unicode Transformation Format. The '8' signifies that it allocates 8-bit blocks to denote a character.
You need to set the encoding in your Content-Type header.
Set it to "application/x-www-form-urlencoded; charset=utf-8". Currently you only set the accept-charset - this tells the server what to send back.
179
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
